Sampling machine



June 7, 1932. L. ANDERSON 21,862,250

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L. ANDERSON SAMPLING MACHINE Filed Feb. 20, 1929 5 Sheets-Sheet 3Patented June 7, 1932 LOUIS ANDERSON, OF EASTON, PENNSYLVANIA SAMPLINGMACHINE Application filed February 20, 1929. Serial No. 341,515.

This invention relates to improvements in sampling mechanism, and whileit has been devised specifically for sampling cement, it will beapparent from the following description that it is applicable to thesampling of various materials in powdered or similar form.

One of the objects of the invention is to provide slimpling mechanismadapted to continuously take a representative sample of cement or thelike, from a moving stream of such material.

More specifically, my improved mecha- 'nism, for example, may beemployed in a conveying line leading from the cement m1ll to storage, orit may be employed in the conduit used 1n feeding the raw material tothe kilns or the like.

A further object is to furnish novel mechanism in the nature of anattachment which may be readily applied to existing conveying mechanismwithout materially altering the latter. My improved sampler may also bereadily driven from any suitable moving part of the conveying mechanismwith which it is employed, or it may be actuated by an independentmotor, if found desirable.

A further object is to provide a sampling mechanism designed tosimultaneously deliver identical representative samples to a pluralityof containers;

With the foreg(m1g objects outlined and with other objects in view whichwill appear as the description proceeds, my invention consists in thenovel features hereinafter described in detail, illustrated in theaccompanying drawings, and more particularly pointed out in the appendedclaims.

Referring to the drawings,

Fig. 1 is a perspective view of the feeding end of a standard typepumping mechanism employed for conveying powdered material such ascement, and showing my improved sampling mechanism attached thereto.Fig. 2 is a transverse vertical view of the same taken lengthwise of thesampling mechanism.

Fig. 3 is a similar view showing the sam pling device cooperatingwiththe conveyor employed in feeding raw material to a kiln or the like.a

Fig. 4 is a perspective view showing my sampler applied to. a chutelocated between screw conveyors of the type employed in feeding rawmaterial to a kiln.

In the drawings, 4 designates a cylindrical screen which is part of thepumping system, and into which the finished cement is delivered by ascrew conveyor 4:. In large cement plants, about 300 pounds-of cement isfed into this screen per hour, and the material, after screening,gravitates into a trough 5, along which it is fed by a screw conveyor 6that delivers the same to storage.

From Fig. 2 it may be seen that the falling stream of cement is quitewide and extends, for instance, from the point A, to the point p B, andin order to continuously obtain a representative sample of thismaterial, I arrangethe mouth 7 of my device across this stream. Thismouth is preferably formed by an elongated slot positioned in the upperside of a relatively narrow tube 8, which extends entirely through thetrough 5, between the screen and screw conveyor.

When my device is to be applied to the standard pumping mechanism, it isonly necessary to cut aligned apertures in the opposite sides of thetrough 5, and to insert the w tube 8 through these apertures, as shown.For the purpose of rigidly holding the tube in place, I may employ anysuitable means, such as brackets 9, to which the tube may besecurelyfastened. A plug 10 is secured in one end of the tube for closing thatend, and the tube houses a relatively small conveying screw 11, which isprovided at its outer end with a fast worm gear 12 that is located in acasing 13, and driven by a Worm W 14 on a shaft 15. Obviously, thelatter may be driven by any suitable means, such for instance, as amotor, but I prefer to drive the same from a moving part of the pumpingmechanism. To this end, the shaft 15 is operatively connected to theshaft of the conveyor 6, and due to the gear ratio between the parts 12and 14, the sampler screw 11 is moved comparatively slow with respect tothe shaft of the conveyor 6.

than the shaft 23.

It will be noted in Fig. 2 that the outer casing including the trough 5and screw conveyor 6, forms conveying means for the material passingfrom the screen 4.

From the foregoing description, it will be appreciated that a relativelywide stream 0 powdered material, such as cement, is constantly' fallingfrom the screen 4, into the conveyor trough 5, and as the mouth or slot7 extends entirely across this stream, a representative sample will beconstantly deposited in the tube 8. As the sampler screw 11 continuouslymoves within the tube, it will feed. the sample material toward the tubeoutlet 13, from which the material may be. discharged\to any suitablepoint.

In order that the manufacturer and a purchaser, for instance, ,masimultaneously each receive equal arts 0 the sampled material, I havecombined the outlet 16 with a bifurcated chute 17 the upper common endof which has a single opening to receive the material, and the branchesfunctioning to deliver this material into a plurality of containers 18.

It will be ap reciated from the above that by myimprove mechanism, thebest possible sample may be obtained, for the sampler not only takesmaterial from one part of the falling stream, but from points all theway across the stream,and as the screw 11 cont'nuously rotates,obviously the sample deliv red will be representative.

I In the embodiment of the invention illustrated in Fig. 3, the sampleris shown applied to the bottom of a conve or trough or conduit 20,which, for examp e, may be a trou h through which raw material is fedtoward t e kiln by a screw conveyor 21. In this modification, a slot maybe cut transversely in the bottom of the trough, and the tube 8 of thesampler may be extended into this slot. Of course, the edges of the slotwill be cut to conform with the external surface of the tube, in orderto prevent any leakage of the material around e tube. This form of theinvention operates in the same manner as the embodiment illustrated inFigs. 1 and 2, and in this construction, the drive shaft 22 of thesampler is operatively connected with the shaft 23 of the screw, andreduction gearing in the casing 24 causes the sampler screw 1 11" tocontinuously rotate at a slower speed Instead of arranging the samplertube in the bottom of the conveyor trough, as shown in Fig. 3, it may beplaced in the conduit, tube or chute (Fig. 4) which conducts the rawmaterial from an upper conveyor 31 to a lower one 32. Like in the otherapplicaj tions of the invention, the drive shaft 33 of the sampler isoperatively connected to the shaft 34 of one of the screw conveyors, anddue to the reduction gearing arranged in the casing 35, the samplerscrew will be rotated at less speed than the shaft 33.

I have only illustrated a few applications of the invention, and it willbe manifest to those skilled in the art that sampling mechanism inaccordance with my invention, may be employed in an environment where itis suitable, and also t at it may be used to samgle any material towhich it is applicable.

bviously, it is es cially useful in an place where it is desira le toconstantly o tain a representative sample of a moving stream of powderedmaterial or the like.

From the foregoing it is believed that the construction, operation andadvantages of the invention may be readily understood, and I am awarethat changes may be made in the details disclosed, .without departinfrom the spirit of the invention, as expresse in the claims. I

What I claim and desire to secure by Letters Patent is:

1. A method of obtaining a representative sample from a relatively widemoving stream of powdered material or the like comprising continuouslygathering a small 'amountof the material simultaneously from amultiplicity of points along a line extending longitudinally across thestream and normal to the moving direction of the stream, moving thegathered material in a path extending normal to the moving direction ofthe stream,

and delivering the sample at one end of said path at a point somewhatremoved from the stream.

2. A method of sampling a relatively wide moving stream of powderrimaterial or the like comprising continuo sly gathering a small amount ofmaterial from points along a line extending entirely across the streamin the direction of its longest dimension and normal to the direction ofthe movement of the stream, moving the gathered material along saidline, and continuously deliverin the gathered material at a point removefrom the stream.

3. .Mechanism for sampling material in a flowing stream, including, arelatively wide conduit through which the stream flows, a stationarytube extending across said conduit and rovided with a constantly openelongate slot in its top to permit the material from substantially allpoints across the stream to enter the tube, and means for continuouslyfeeding the admitted material along the tube and 'for discharging thematerial from said tube.

4. Sampling mechanism for powdered material or the like, including arelatively wide conduit through which the material flows, a stationaryhollow member extending across said conduit and havin an elongated mouthof a length substantially equal to the width of said conduit, and meansfor continuously feeding material admitted through said mouth along themember and for discharging the same from said member.

5. Sampling mechanism for powdered-material or the like, including arelatively wide conduit through which the material flows, a

stationary tube extending across said conduit and provided on its upperside with an elongated slot of a length substantially equal to the widthof the conduit to admit material to the tube, a screw conveyor arrangedwithin the tube, and means for continuously rotating said conveyor.

6. In mechanism of the character described,

conveying means adapted to conduct a moving stream of powdered materialor the like,

said conveying means including a movable conveyor, a hollow memberextending transversely substantially entirely across the conveying meansand having an elongated mouth 2 to receive material from substantiallyentirely across the moving stream, a conveyor in said hollow member, andmeans for continuously driving the last mentioned conveyor from thefirst mentioned conveyor, and at less speed than the latter.

7 In mechanism of the character described, conveying means adapted toconduct a flowing stream of powdered material and provided with amovable conveyor, a relatively narrow tube extending transverselysubstantially entirely across the conveying means and having anelongated stationary mouth adapted to receive material fromsubstantially entirely across the moving stream, a conveyor screw insaid tube, and means for continuously driving the screw from saidvconveyor andat substantially less speed than the latter.

8. The combination with conveying means adapted to conduct acontinuously moving stream of powdered material or the like, andprovided with a continuously movable conveyor, of a sampler tubeextending transversely substantially entirely across the contionarymouth arranged to continuously receive a part of the material along aline extending substantially entirely across the moving stream, aconveyor screw arranged within the tube, and means for continuouslyrotating said screw from the conveyorand at substantially less speedthan the latter.

9. A sampler for use with powdered material or the like, including arelativel wide conduit through which the material ows, a relativelynarrow tube extending substantially entirely across said conduit andhaving an elongated slot of substantially the same length as the widthof the conduit, means closing one end of the tube, a conveyor screwrotatably mounted in the tube, a drive shaft, and reduction gearingoperatively connecting said shaft to the conveyor screw.

10. A, sampler for use with powdered Inaterial or the like, including arelatively wide conduit through which the material flows, a

relatively narrow tube extending substantially entirely across saidconduit and having an elongated slot of substantially the same length asthe width of the conduit, a

specification.

LOUIS ANDERSON.

veying means, and having an elongated sta-

